From: Vadzim Dambrouski <pftbest@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 1/2] arm: add support for semihosting for ARMv7M targets
Date: Mon, 19 Oct 2015 00:13:28 +0300 [thread overview]
Message-ID: <1445202809-11711-1-git-send-email-pftbest@gmail.com> (raw)
It is possible to enable CONFIG_SEMIHOSTING for STM32F429 target, but it
would result in compile error. This patch adds support for semihosting for
STM32F429 or any other ARMv7M target. Tested on STM32F429-DISCOVERY board.
Signed-off-by: Vadzim Dambrouski <pftbest@gmail.com>
---
arch/arm/lib/semihosting.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c
index c3e964e..ed5e8e4 100644
--- a/arch/arm/lib/semihosting.c
+++ b/arch/arm/lib/semihosting.c
@@ -31,6 +31,8 @@ static noinline long smh_trap(unsigned int sysnum, void *addr)
register long result asm("r0");
#if defined(CONFIG_ARM64)
asm volatile ("hlt #0xf000" : "=r" (result) : "0"(sysnum), "r"(addr));
+#elif defined(CONFIG_CPU_V7M)
+ asm volatile ("bkpt #0xAB" : "=r" (result) : "0"(sysnum), "r"(addr));
#else
/* Note - untested placeholder */
asm volatile ("svc #0x123456" : "=r" (result) : "0"(sysnum), "r"(addr));
--
2.6.1
next reply other threads:[~2015-10-18 21:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-18 21:13 Vadzim Dambrouski [this message]
2015-10-18 21:13 ` [U-Boot] [PATCH v2 2/2] arm: fix compile warnings when semihosting is enabled on ARMv7M target Vadzim Dambrouski
2015-10-19 6:06 ` Albert ARIBAUD
2015-10-19 10:00 ` Vadzim Dambrouski
2015-10-19 6:00 ` [U-Boot] [PATCH v2 1/2] arm: add support for semihosting for ARMv7M targets Albert ARIBAUD
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